A player may choose to "knock" instead of going for gin, but the value of the unmatched cards in his hand (after he discards) cannot exceed 10 points.

当他（打出牌以后）手中的没有匹配的牌总分值不超过10分时，玩家可以选择“敲门”，而不是“金”。

youdao

Your competitor has built a 12" thick steel door between the customer and any source of value. Knock gently on the door.

你的对手却在客户和有价值信息之间建起了一道12英寸厚的铁门。

youdao

Ignoring a girl to knock down her social value - when she already has low social value to begin with - could crush her ego.

无视女孩，降低他们的社交价值- - -当她们一开始便只有低价值的时候会摧毁她们的自尊。

youdao

Yet regulators and lawsuit-fearful auditors pressed banks and other financial firms to relentlessly knock down the book value of this subprime paper, even in cases where these obligations were being serviced in the payment of principal and interest.

FORBES: Magazine Article

The knock-on effect was a major drop in the rial's value as Iran's central bank fell short on US dollars, before finding alternative routes for bringing its petrodollars home.

BBC: Iran currency crisis: Sanctions detonate unstable rial